Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
  • H01H71/04—Means for indicating condition of the switching device
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
  • H01H71/10—Operating or release mechanisms
  • H01H71/50—Manual reset mechanisms which may be also used for manual release
  • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
  • H01H71/526—Manual reset mechanisms which may be also used for manual release actuated by lever the lever forming a toggle linkage with a second lever, the free end of which is directly and releasably engageable with a contact structure
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
  • H01H71/02—Housings; Casings; Bases; Mountings
  • H01H71/0264—Mountings or coverplates for complete assembled circuit breakers, e.g. snap mounting in panel
  • H01H71/0271—Mounting several complete assembled circuit breakers together
  • H01H2071/0278—Mounting several complete assembled circuit breakers together with at least one of juxtaposed casings dedicated to an auxiliary device, e.g. for undervoltage or shunt trip
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
  • H01H71/10—Operating or release mechanisms
  • H01H71/1009—Interconnected mechanisms

Definitions

• the present invention relates to a low-voltage switch device comprising means of protection against short circuit and / or overload surges.
• a protective switching device of this kind is described in patent EP-0 026 416 and comprises in a housing:
• the release mechanism having a spoiler for hanging or releasing a lug of the contact lever and at least one bearing surface against which is applicable a movable member of the magnetic and / or thermic trigger, - a spring urging the contact lever in an area between the post and the fixed pivot axis of the lever.
• the trigger piece pivots about a fixed axis and cooperates with a hooking piece of the contact lever.
• the attachment piece is articulated to the lever, while the trigger piece has an arm capable of striking a finger of the attachment piece to rotate the latter which then releases the contact lever.
• this known device can be simplified.
• it has the disadvantage of not allowing simple discrimination of automatic trips occurring on fault and voluntary openings controlled by means of the joystick.
• the triggering piece pivots in the same way in all cases.
• the object of the invention is in particular to simplify the design and mounting of a protective switch device of the type described above. Another object is to distinguish a trigger on fault from a manual trigger in such a protective switch device whose architecture is simplified and made extremely space-saving.
• the triggering mechanism comprises a triggering part having the catching spout for the contact lever and the bearing surface for the movable member of the trigger; the triggering part is directly articulated to the lever, the respective trajectories described by said part when tripping on a fault and when tripping caused by the lever. being at least partly distinct.
• the device is simplified since the functions for hooking the contact lever and for direct reception of forces and the respective movements of the magnetic trip device, of the thermal trip device and of the lever are all provided by the trip piece, while simple means, such as a notch of appropriate shape and orientation, arranged in the piece of tripping and a cooperating post provided on an adjacent signaling additive, make it possible to signal via this additive the only trips on fault excluding the voluntary trips produced by the lever.
• a spring is associated with the lever to urge the latter towards its "stop" position; this spring has one end applied to a fixed support of the housing and another end which is applicable, either in the running state on a pivot pin of the triggering part with the lever, or in the stopped state on a boss of the trigger piece offset from the axis of the journal.
• the spring in question is preferably a torsion spring; in more bulky embodiments, it could be constituted by a pin or helical spring. It follows that, in the initial phase of a trip on fault, the trip piece remains relieved of the force of the opening spring associated with the lever.
• Figure 1 shows a side view in section of a protective switch device according to the invention
• Figures 2 to 5 show on a larger scale the lever, the triggering mechanism and the contacts of the device of Figure 1, respectively in the closed state (Figure 2), in an initial phase opening on fault (Figure 3), in an intermediate phase of opening on fault or manual (Figure 4), and in the final state of opening (Figure 5);
• FIG. 6 shows in isolation in elevation the intermediate release part between the lever and the contact lever
• FIGs 7 and 8 show the same part in the respective positions of Figures 3 and 4;
• Figure 9 shows in perspective the part of Figures 6 to 8;
• Figure 10 shows a front view of the attachment piece of Figure 6 coupled to a complementary part
• FIG. 11 is a perspective of a hooking piece designed to allow interpo ⁇ lar coupling
• FIG. 12 shows a front view of the attachment piece of FIG. 11.
• the protective switch device 10 shown in FIG. 1 comprises in an insulating housing 11 a fixed contact 12 and a movable contact 13, the movable contact being disposed on a lever 4th contact 14.
• a current path is established in the housing between a terminal 15 and a terminal 16 of the device when the movable contact is applied to the fixed contact; this path is interrupted when the movable contact is separated from the fixed contact, either under the effect of a magnetic trip device 17 or a thermal trip device 18 with bimetallic strip 18a, or under the effect of a lever 19 for manual control or voluntary.
• Triggers 17 and 18 are implemented respectively in the event of a short circuit and in the event of an overload to produce a free trigger.
• the controller acts independently of the trigger to open and close contacts, from an "on" position shown in Figure 1 to a position "stop" visible in Figure 5 and vice ver ⁇ a. It goes without saying that a remote opening and closing device for the contacts can be associated with the lever. On the other hand, a switching chamber 20 provided with arc blowing elements is provided under the magnetic trip device 17 and the contacts 12, 13.
• a single triggering piece 21 is used for hooking the contact lever 14 and is articulated directly by means of an ear 21c on a pin 22 linked to the lever 19.
• the triggering piece 21 is a piece in molded insulating material which comprises a body 23 provided with an arm 24 itself provided at its free end with a bearing surface 25 forming a cam with a clearance 26 on the side of the handle 26 the part 21 comprises more attachment spoiler 27 capable of retaining a lug 28 provided at the upper part 29 of the contact lever 14, as well as a bearing surface 30 for this part 29 and a pin or a bos ⁇ age 31 whose role will be explained below .
• the cam 25 is arranged to allow tripping as soon as the contacts 12, 13 are in mutual support.
• the contact lever 14 comprises in its central region 32 an oblong recess 33 into which a fixed pivot 34 is introduced; between the zone 32 and the post 28, the lever 14 is biased to the left by a spring 35 which is also applied against the housing.
• an opening assistance spring 36 in the form of a torsion spring wound on a cylindrical surface of the handle.
• the spring has an end branch applied at a fixed point 37 in the housing (see FIG. 2) and another end branch applied to the pin 22 of the lever or to the boss 31 of the triggering piece according to the positions of works.
• the magnetic trigger 17 comprises a movable core 38 displaceable along an axis XX parallel to the bottom 11a of the housing of the device.
• the core 38 is extended beyond the carcass 39 of the trigger 17 by a rod or a frame having a bearing 40 applicable on the bearing surface 25 of the arm 24 of the lever, a bearing 41 for percussion of the contact lever 14 and a range 42 capable of being pushed to the right by the bimetallic strip 18 in the event of overload.
• the axis 01 of the lever 19, the axis 02 of the barrel 22 and the pin 28, are substantially aligned, the axis 02 being however slightly at above the line joining axis 01 to stud 28.
• FIGS. 6 to 10 also represent an embodiment of the triggering part 21 making it possible to transmit the electrical fault information mechanically to an adjacent additive signaling device.
• the part 21 comprises for this purpose a notch 43 of suitable shape and orientation, for example bent, curved or in the form of a butt for accommodating a projection 44 of an operating part housed in the housing 45 of an additive apparatus signaling 46 (Figure 10), and to move this projection 44 in the event of a fault trip ( Figure 8>, without moving the projection 44 in the event of manual opening (Figure 9).
• the sail ⁇ lie 44 passes through a opening 47 formed in the housing 45 and an opening 48 formed in the housing 11 and visible in dashed lines in FIGS. 2-4 and 6-8.
• the triggering and hooking part 21a illustrated by FIGS. 11 and 12 comprises, on one side, a notch 50 and, on the other side, an axis 51; the axis 51 of a part 21a of a pole cooperates with the notch 50 of a trigger part and hooking 21b of a neighboring pole to allow pole-to-pole triggering ( Figure 12).
• the same trigger and attachment piece can of course have a notch 43 and / or a notch 50 or a pin 51 and / or a notch capable of cooperating with a differential trigger device.
• the protective switch device shown in the figures operates as follows.
• the core 38 of the magnetic trip unit occupies its rest position on the left and the bimetallic strip 18a of the thermal trip unit 18 is in its rest position on the left.
• the spring 36 of the lever biases the pin 22 clockwise; the pin remains in position, however, due to the attachment of the spoiler 27 to the tenon 28. It is noted that the spring 36 does not hamper the pivoting of the triggering piece 21 relative to the axis 02 of the journal as we will see it later.
• the movable projection 44 of the additive remains housed in the bottom of the 'notch and is driven up the windows 47, 48 to produce the desired signaling action.
• the movement of the part 21 is illustrated in FIG. 7 where its initial state and its state at the end of the first phase are represented respectively in dashes and in solid lines.
• the core 38 of the magnetic trip unit no longer provides any engine force and the spring 36 of the lever rotates the pin 22 clockwise around the axis 01, so that the part 21 goes back down.
• the core 38 of the magnetic trigger is pushed to the left by the cam 25 of the arm 24.
• FIGS. 3, 4 and 5 This second phase is successively illustrated by FIGS. 3, 4 and 5.
• the spoiler 27 hooks onto the tenon 28 of the contact lever in order to reset the mechanism, while the branch of the spring 36 hitherto applied against the journal 22 is applied to the boss 31 of the part 21 (see Figure 4).
• the spring 36 confirms the opening of the movable contact 13 by urging the part 21 to the low position indicated in FIG. 5; the clearance 26 of the arm 24 then comes to bear against the core 38 in order to push it back against a stop not shown.
• the lever 19 then occupies its "stop" position (FIG. 5).
• the lever 19 is brought by the operator from the position of FIG. 1 to the position of FIG. 5 passing through the position of FIG. 4, while the triggers 17, 18 remain resting. Consequently, if the triggering part 21 has a notch 43 (see FIG. 8), it can escape without causing the projection 44 of the signaling additive; the initial position of the part 21 is indicated in dashes in FIG. 8 and its intermediate position - corresponding to that of FIG. 4- is indicated in solid lines.
• the device is reset by rotating the handle 19 counterclockwise to return the handle and the entire mechanism to the position of FIG. 2.

Applications Claiming Priority (2)

Publications (1)

Family

ID=9350314

Family Applications (1)

Country Status (5)

Cited By (1)

Families Citing this family (9)

Family Cites Families (2)

• 1987
  • 1987-04-21 FR FR8705595A patent/FR2614467A1/fr not_active Withdrawn
• 1988
  • 1988-04-20 JP JP50368788A patent/JPH01503263A/ja active Pending
  • 1988-04-20 WO PCT/FR1988/000194 patent/WO1988008614A1/fr not_active Application Discontinuation
  • 1988-04-20 EP EP19880903860 patent/EP0311668A1/de not_active Withdrawn
  • 1988-04-21 ES ES8801235A patent/ES2006915A6/es not_active Expired

Non-Patent Citations (1)

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